LSR liquid silicones for Liquid Injection Moulding

Silicones for LIM procedures (Liquid Injection Moulding) are standard two component liquid silicones. LSR crosslink under heat impact at a mixing ratio of 1:1 through polyaddition with a platinum catalyst.

Their unique processing properties make LSR appropriate for numerous industrial fields and most versatile application fields.

The CHT products of the ALPA-LSR series crosslink without byproducts and offer extraordinary mechanical properties. Due to the low compression set ALPA-LSR products are the ideal components for producing complex shapes.

The ALPA-LSR product series can be found in our product finder. Of course we will be happy to advise you personally on products and application procedures.

ALPA-LSR products stand out for the following excellent properties

  • High dimensional stability
  • High temperature resistance (- 50 to + 200 °C)
  • High elongation and flexibility even at temperatures far below 0°C
  • Hydrophobic behaviour
  • High UV and weather resistance
  • High ozone resistance
  • Good mechanical and damping properties
  • No outgassing reaction products
  • Mouldings with complex shapes are possible
  • Effective production of high quantities by means of short cycles
  • High transparency
  • Suited for food contact (complies with FDA and BfR)


LSR injection moulding procedures score in several aspects in comparison with classic thermoplastic injection moulding procedures

  • Higher heat stability up to 230 °C
  • Low viscosity which facilitates a simple and quicker processing
  • Higher elongation and tensile strength
  • Suited for medical applications and for contact with human tissues
  • Detailed mouldings are possible
  • Production of smallest pieces is possible
  • Quick crosslinking as soon as components A & B have been blended


We'll be happy to advise you.


The laser-competent LSR types ALPA-LSR 550201 and 550202 allow for realising top modern labelling solutions

  • Highly flexible and permanent laser labelling on completed components in versatile application fields
  • The labellings are extremely durable, scratch-proof and abrasion-resistant
  • Labelling of the storability or application of QR codes or bar codes, logos, lot numbers and many more
  • Various intensities of lasering from surface labelling up to a deep engraving
  • Labelling from pale grey up to black on differently coloured as well as on transparent components
  • Application in the food sector and in medical technology thanks to an FDA and BfR certification




ALPA-LSR 550201    ALPA-LSR 550202



Sector German title English title Type Date Language
Material SolutionsLSR für SpritzgussverfahrenLSR for liquid injection mouldingBrochure26.11.2018
Material SolutionsALPA-LSR | Permanente LaserkennzeichnungALPA-LSR | Permanent laser markingBrochure20.09.2019